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22 mm PTFE/Silicone Soil Sample Septa (100/pk)
Brand: Chromatography Research Supplies Inc22 mm PTFE/silicone septa, specially developed for purge-and-trap analysis using soil sample jars in DynaSoils (registered), DynaTrap (registered) and similar instruments. It is a GC-quality septa suitable for your most sensitive analyses; pre-conditioned to be free from volatiles. Also superior for EPA sampling. A layer of PTFE is layered on silicone; 22 mm diameter; 3 mm total thickness. Packaged: 4 in. x 6 in. plastic bag; Weight: 144.2 g.